Book  (2000)  Page(s) 129.  
 
Colin P. Horner. The 1999 Trial Ground Awards in Great Britain. Trial Ground Certificate.
'Diczoom'. Shrub (TG2289); yellow, bears few clusters of semi-double blooms, growth arching and spreading, up to 5ft x 6ft. Moderate scent. Seedling x seedling. Dickson, N. Ireland.